Univention Corporate Server 3.2 erratum 197 (bugfix)

* The modification of the alternative mail address is now allowed in
AD member mode.
* The syntax for group names has been adapted. The default group names
of a French Active Directory are allowed now.
* A traceback has been fixed if more than one colon is set in the
automountInformation attribute.
* The setting of the Kerberos principal name for computer/macos
objects have been fixed.